CMysqlCommandBuilder
| 包 | system.db.schema.mysql |
|---|---|
| 继承 | class CMysqlCommandBuilder » CDbCommandBuilder » CComponent |
| 可用自 | 1.1.13 |
| 源码 | framework/db/schema/mysql/CMysqlCommandBuilder.php |
CMysqlCommandBuilder provides basic methods to create query commands for tables.
公共属性
| 属性 | 类型 | 描述 | 被定义在 |
|---|---|---|---|
| dbConnection | CDbConnection | database connection. | CDbCommandBuilder |
| schema | CDbSchema | the schema for this command builder. | CDbCommandBuilder |
受保护的属性
| 属性 | 类型 | 描述 | 被定义在 |
|---|---|---|---|
| integerPrimaryKeyDefaultValue | string | Returns default value of the integer/serial primary key. Default value means that the next | CDbCommandBuilder |
公共方法
| 方法 | 描述 | 被定义在 |
|---|---|---|
| __call() | Calls the named method which is not a class method. | CComponent |
| __construct() | CDbCommandBuilder | |
| __get() | Returns a property value, an event handler list or a behavior based on its name. | CComponent |
| __isset() | Checks if a property value is null. | CComponent |
| __set() | Sets value of a component property. | CComponent |
| __unset() | Sets a component property to be null. | CComponent |
| applyCondition() | Alters the SQL to apply WHERE clause. | CDbCommandBuilder |
| applyGroup() | Alters the SQL to apply GROUP BY. | CDbCommandBuilder |
| applyHaving() | Alters the SQL to apply HAVING. | CDbCommandBuilder |
| applyJoin() | Alters the SQL to apply JOIN clause. | CMysqlCommandBuilder |
| applyLimit() | Alters the SQL to apply LIMIT and OFFSET. | CMysqlCommandBuilder |
| applyOrder() | Alters the SQL to apply ORDER BY. | CDbCommandBuilder |
| asa() | Returns the named behavior object. | CComponent |
| attachBehavior() | Attaches a behavior to this component. | CComponent |
| attachBehaviors() | Attaches a list of behaviors to the component. | CComponent |
| attachEventHandler() | Attaches an event handler to an event. | CComponent |
| bindValues() | Binds parameter values for an SQL command. | CDbCommandBuilder |
| canGetProperty() | Determines whether a property can be read. | CComponent |
| canSetProperty() | Determines whether a property can be set. | CComponent |
| createColumnCriteria() | Creates a query criteria with the specified column values. | CDbCommandBuilder |
| createCountCommand() | Creates a COUNT(*) command for a single table. | CDbCommandBuilder |
| createCriteria() | Creates a query criteria. | CDbCommandBuilder |
| createDeleteCommand() | Creates a DELETE command. | CDbCommandBuilder |
| createFindCommand() | Creates a SELECT command for a single table. | CDbCommandBuilder |
| createInCondition() | Generates the expression for selecting rows of specified primary key values. | CDbCommandBuilder |
| createInsertCommand() | Creates an INSERT command. | CDbCommandBuilder |
| createMultipleInsertCommand() | Creates a multiple INSERT command. | CDbCommandBuilder |
| createPkCondition() | Generates the expression for selecting rows of specified primary key values. | CDbCommandBuilder |
| createPkCriteria() | Creates a query criteria with the specified primary key. | CDbCommandBuilder |
| createSearchCondition() | Generates the expression for searching the specified keywords within a list of columns. | CDbCommandBuilder |
| createSqlCommand() | Creates a command based on a given SQL statement. | CDbCommandBuilder |
| createUpdateCommand() | Creates an UPDATE command. | CDbCommandBuilder |
| createUpdateCounterCommand() | Creates an UPDATE command that increments/decrements certain columns. | CDbCommandBuilder |
| detachBehavior() | Detaches a behavior from the component. | CComponent |
| detachBehaviors() | Detaches all behaviors from the component. | CComponent |
| detachEventHandler() | Detaches an existing event handler. | CComponent |
| disableBehavior() | Disables an attached behavior. | CComponent |
| disableBehaviors() | Disables all behaviors attached to this component. | CComponent |
| enableBehavior() | Enables an attached behavior. | CComponent |
| enableBehaviors() | Enables all behaviors attached to this component. | CComponent |
| evaluateExpression() | Evaluates a PHP expression or callback under the context of this component. | CComponent |
| getDbConnection() | Returns database connection. | CDbCommandBuilder |
| getEventHandlers() | Returns the list of attached event handlers for an event. | CComponent |
| getLastInsertID() | Returns the last insertion ID for the specified table. | CDbCommandBuilder |
| getSchema() | Returns the schema for this command builder. | CDbCommandBuilder |
| hasEvent() | Determines whether an event is defined. | CComponent |
| hasEventHandler() | Checks whether the named event has attached handlers. | CComponent |
| hasProperty() | Determines whether a property is defined. | CComponent |
| raiseEvent() | Raises an event. | CComponent |
受保护的方法
| 方法 | 描述 | 被定义在 |
|---|---|---|
| composeMultipleInsertCommand() | Creates a multiple INSERT command. | CDbCommandBuilder |
| createCompositeInCondition() | Generates the expression for selecting rows with specified composite key values. | CDbCommandBuilder |
| ensureTable() | Checks if the parameter is a valid table schema. | CDbCommandBuilder |
| getIntegerPrimaryKeyDefaultValue() | Returns default value of the integer/serial primary key. Default value means that the next | CDbCommandBuilder |
方法详情
applyJoin()
方法
|
public string applyJoin(string $sql, string $join)
| ||
| $sql | string | the SQL statement to be altered |
| $join | string | the JOIN clause (starting with join type, such as INNER JOIN) |
| {return} | string | the altered SQL statement |
源码： framework/db/schema/mysql/CMysqlCommandBuilder.php#28 (显示)
public function applyJoin($sql,$join)
{
if($join=='')
return $sql;
if(strpos($sql,'UPDATE')===0 && ($pos=strpos($sql,'SET'))!==false)
return substr($sql,0,$pos).$join.' '.substr($sql,$pos);
elseif(strpos($sql,'DELETE FROM ')===0)
{
$tableName=substr($sql,12);
return "DELETE {$tableName} FROM {$tableName} ".$join;
}
else
return $sql.' '.$join;
}
Alters the SQL to apply JOIN clause. This method handles the mysql specific syntax where JOIN has to come before SET in UPDATE statement and for DELETE where JOIN has to be after FROM part.
applyLimit()
方法
|
public string applyLimit(string $sql, integer $limit, integer $offset)
| ||
| $sql | string | SQL query string without LIMIT and OFFSET. |
| $limit | integer | maximum number of rows, -1 to ignore limit. |
| $offset | integer | row offset, -1 to ignore offset. |
| {return} | string | SQL with LIMIT and OFFSET |
源码： framework/db/schema/mysql/CMysqlCommandBuilder.php#51 (显示)
public function applyLimit($sql,$limit,$offset)
{
// Ugly, but this is how MySQL recommends doing it: https://dev.mysql.com/doc/refman/5.0/en/select.html
if($limit<=0 && $offset>0)
$limit=PHP_INT_MAX;
return parent::applyLimit($sql,$limit,$offset);
}
Alters the SQL to apply LIMIT and OFFSET.